Cutting apparatus for cigarette making machines



June 2o, 1933. R E, RSLER 1 11,914,756

CUTTING APPARATUS FOR CIGARETTE MAKING MACHINES Filed Jan. 22, 1932 2 Sheets-Sheet lv mvEN-rom .June 20, 1933i R; E, RSLER 1,914,756

CUTTING APPARATUS FOR CIGARETTE MAKING MACHINES Filed Jan. 22, 1932 z-sneets-sneet 2 'd @Uh INVENTOR Patented lisg PATENT ortica g REGHARD ERECH OF DRESDEN, GERLYANY, ASSGNR TO UNTERSELLE CGACEETTENMASCHNEN-SABRiK Il'. C, "MULLER @t CO., OF DRESDEN, GERMANY CUTTING AEARAT'S FR FEGABETTE MAKlNG MACHINES Application filed January 22, 1932, Serial No. 588,207, and in. Germany October 27, 1931.

rlhis invention rel a-tes to cutting apparatus for rod cigarette machines, in which the knife is mounted so as to be radially movable on a rotating holder.

ln cutting apparatus for rod cigarette mak ing machines having a sickle knife made from band steel and mounted on a rotatable knife carrier, the knife which projects only to a small extent through the rod must be frequently adjusted owing to the continuous grinding. it has already been proposed to arrange for this purpose a ratchet wheel mechanism on the knife carrier. in the known con struction two adjusting devices are provided one of which serves mainly to move the knife while the machine o ierates, and in. which the feed of the knife depends upon the circumferential speed of the knife carrier. The second adj usting device serves to adjust the knife nur-ing the stoppage of the machine.

The present invention renders it possible to adjust *the knife independently of the rotation of the knife carrier. For this purpose an element is provided which is centrally arranged, actuated by hand, and adapted to be .moved continuously both during stoppage and rotation of the knife carrier. Preferably the pawl of the ratchet wheel mechanism for driving the knife is secured to a holder arranged in the axis of rotation of the 1Knife and lly reciprocated by hand.

i constructional example of the invention is shown in the accompanying drawings, wherein:

lEigure l a vertical section through the knife support and its bearing, with the feeding device for the knife.

Figure 2 is a partial section through Figure l along the line 2 2.

Figure 3 is a part of Figure l on a larger scale, and

Figure el ure 1.

in the drawings, a is the spindle of the knife carrier which is supported in a bearing is a view from the right of Fig- 7). The drive of this spindle is not shown in the drawings. The knife carrier comprises substantially a rotating disc c fast on the spindle a and having on one side a recess c1 wherein the knife CZ of band steel is slidably mounted. n cover plate c lies over the recess c1 that a guide-way for the knife is provided between the two plates c and e. The entire knife carrier, comprising the two plates c and e, is mounted in known manner obliquely to the axis of the spindle a so that, during rotation, the cutting edge of the knife makes a movement in the direction of the axis of rotation and can follow the rod.

So far, the device is known.

According to the invention, the knife carrier is provided with two rollers f and g bearing against the knife d and gripping it between them. A worm wheel h is mounted on the spindle of the roller f and engages a worm z' on a spindle 7:. The spindle .c is in its turn supported on the knife carrier, preferably on the plate e, in the two bearings m and m1, and

- carries near the axis of the spindle a a ratchet wheel n which is secured by a spring o against unintentional rotation. To the plate e there is also secured a pin p which lies centrally with the axis of rotation of the knife carrier and on which a sleeve g is guided. A spring ff tends to press the sleeve off the guide pin p. stop screw or the like s, inserted in the pin y) and running in a slot in the sleeve g serves to limit the movement. Further, a pawl t is provided on the sleeve g which pawl is held by a spring u in engagement with the ratchet wheel n.

The mode of operation of the device is consequently as follows:

During the ordinary working of the machine, the knife carrier c, e, with the knife Z rotates and the knife is held fast between the two rollers 7, g so that radial movement under the influence of centrifugal force is im possible. If, due to the wear of the knife, an adjustment is to be made, the operator attending the machine has merely to push the sleeve g on the pin p one or more times against the action of the spring 7, The pawl t thereby engages the ratchet wheel n and, on each movement of the sleeve g, rotates the ratchetwheel further by one tooth. The movementof the ratchet wheel is transmitted through the spindle 7c and the worm gear 7L, i to the roller f which makes a correspondingly very small rotation, thereby moving the knife (l outwardly in the radial direction.

It is sufficient if one of the two rollers is driven, that is to say, as in the constructional example, the roller f, but the rollers f and g may also be connected together to rotate in opposite directions for example by means of a pair of gear wheels, so as to be driven and to feed the knife in common.

Of course, the device may be constructed in a different manner without departing from the invention. Thus7 for example, instead of the friction wheels f, g, the knife may also be held between the gripping plates or may be securely xed to a plate, for example by screwing and this plate may be gradually fed forward by a gear wheel mounted on the spindle k.

I claim:-

l. A cutting apparatus for rod cigarette making machines, comprising a rotatably mounted disc; a knife mounted on the disc and capa-ble of radial movement; and means for adjusting said knife and adapted to be -actuated to carry out a radial adjustment both while the disc and knife are rotating and during the stoppage thereof, said means comprising a pair of rollers mounted on the disc and on each side of the knife to contact therewith; a plurality of gears for driving one of said rollers; and a device centrally arranged relative to the disc to actuate the gears and rollers.

wheel mechanism for driving said rollers; and n a device centrally arranged relative to the dise to actuate the pawl and ratchet mechanism.

3. A cutting apparatus for rod cigarette making machines, comprising a rotatably mounted disc; a knife mounted on the disc and capable of radial movement; and means for adjusting said knife and adapted to be actuated to carry out a radial adjustment both while the disc and knife are rotating and during the`stoppage thereof, said means com- 

